gl/tests/test-mbsalign.c

   1 /* Test that mbsalign works as advertised.
   2    Copyright (C) 2010-2011 Free Software Foundation, Inc.
   3
   4    This program is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  16
  17 /* Written by Pádraig Brady.  */
  18
  19 #include <config.h>
  20
  21 #include "mbsalign.h"
  22 #include "macros.h"
  23 #include <stdlib.h>
  24 #include <locale.h>
  25
  26 int
  27 main (void)
  28 {
  29   char dest[4 * 16 + 1];
  30   size_t width, n;
  31
  32   /* Test unibyte truncation.  */
  33   width = 4;
  34   n = mbsalign ("t\tés", dest, sizeof dest, &width, MBS_ALIGN_LEFT, 0);
  35   ASSERT (n == 4);
  36
  37   /* Test center alignment.  */
  38   width = 4;
  39   n = mbsalign ("es", dest, sizeof dest, &width, MBS_ALIGN_CENTER, 0);
  40   ASSERT (*dest == ' ' && *(dest + n - 1) == ' ');
  41
  42   if (setlocale (LC_ALL, "en_US.UTF8"))
  43     {
  44       /* Check invalid input is flagged.  */
  45       width = 4;
  46       n = mbsalign ("t\xe1\xe2s", dest, sizeof dest, &width, MBS_ALIGN_LEFT, 0);
  47       ASSERT (n == (size_t) -1);
  48
  49       /* Check invalid input is treated as unibyte  */
  50       width = 4;
  51       n = mbsalign ("t\xe1\xe2s", dest, sizeof dest, &width,
  52                     MBS_ALIGN_LEFT, MBA_UNIBYTE_FALLBACK);
  53       ASSERT (n == 4);
  54
  55       /* Test multibyte center alignment.  */
  56       width = 4;
  57       n = mbsalign ("és", dest, sizeof dest, &width, MBS_ALIGN_CENTER, 0);
  58       ASSERT (*dest == ' ' && *(dest + n - 1) == ' ');
  59
  60       /* Test multibyte left alignment.  */
  61       width = 4;
  62       n = mbsalign ("és", dest, sizeof dest, &width, MBS_ALIGN_LEFT, 0);
  63       ASSERT (*(dest + n - 1) == ' ' && *(dest + n - 2) == ' ');
  64
  65       /* Test multibyte right alignment.  */
  66       width = 4;
  67       n = mbsalign ("és", dest, sizeof dest, &width, MBS_ALIGN_RIGHT, 0);
  68       ASSERT (*(dest) == ' ' && *(dest + 1) == ' ');
  69
  70       /* multibyte multicell truncation.  */
  71       width = 4;                /* cells */
  72       n = mbsalign ("日月火水", dest, sizeof dest, &width,
  73                     MBS_ALIGN_LEFT, 0);
  74       ASSERT (n == 6);          /* 2 characters */
  75
  76       /* multibyte unicell truncation.  */
  77       width = 3;                /* cells */
  78       n = mbsalign ("¹²³⁴", dest, sizeof dest, &width, MBS_ALIGN_LEFT, 0);
  79       ASSERT (n == 6);          /* 3 characters */
  80
  81       /* Check independence from dest buffer. */
  82       width = 4;                /* cells */
  83       n = mbsalign ("¹²³⁴", dest, 0, &width, MBS_ALIGN_LEFT, 0);
  84       ASSERT (n == 9);          /* 4 characters */
  85
  86       /* Check that width is updated with cells required before padding.  */
  87       width = 4;                /* cells */
  88       n = mbsalign ("¹²³", dest, 0, &width, MBS_ALIGN_LEFT, 0);
  89       ASSERT (width == 3);
  90
  91       /* Test case where output is larger than input
  92          (as tab converted to multi byte replacement char).  */
  93       width = 4;
  94       n = mbsalign ("t\tés" /* 6 including NUL */ , dest, sizeof dest,
  95                     &width, MBS_ALIGN_LEFT, 0);
  96       ASSERT (n == 7);
  97     }
  98
  99   return 0;
 100 }